Here's a option for you Buck. I run into a oldtimer on one of the Skeena tribs about every fall who cut a waist sized hole in the bottom of his ten-foot inflatable raft. He wades and casts (he's a bug-fisherman) with the raft around his thighs as he works his way down a fishable run. At the bottom he mearly slides up and into the raft and rows downstream to the next hole with his lower legs penitrating the floor. It is very effiecient as he has elliminated the down time of walking back to get the boat after fishing a run. Probably safer than the float tube idea, too.

I asked him about the legality of the set-up in a river where fishing from a boat is prohibited. He said the game warden claimed as long as his feet were "on the bottom" of the river while he fished, he was within his legal right. Just FYI. It is pretty cool to watch.